9 4
r
aaaaaaaaa
bbbbbbbbb
ccccccccc
ddddddddd
eeeeeeeee
fffffffff
ggggggggg
hhhhhhhhh
iiiiiiiii
c
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
a
aaabbbccc
aaabbbccc
aaabbbccc
dddeeefff
dddeeefff
dddeeefff
ggghhhiii
ggghhhiii
ggghhhiii
b
aaaaabbbb
aacccccbb
adddeccfb
adddeccfb
gdeeeeefb
gdhhefffi
gdhhefffi
gghhhhhii
ggggiiiii
bcceffhii
abcdefghi
aabddeggh
kllbcceff
jklabcdef
jjkaabdde
nookllbcc
mnojklabc
mmnjjkaab